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fitstopnm - convert a FITS file into a portable anymap
fitstopnm
[-image N] [-noraw] [-scanmax] [-printmax] [-min f] [-max f] [FITSfile]
Reads
a FITS file as input. Produces a portable pixmap if the FITS file consists
of 3 image planes (NAXIS = 3 and NAXIS3 = 3), a portable graymap if the
FITS file consists of 2 image planes (NAXIS = 2), or whenever the -image
flag is specified. The results may need to be flipped top for bottom; if
so, just pipe the output through pnmflip -tb.
The -image option is
for FITS files with three axes. The assumption is that the third axis is
for multiple images, and this option lets you select which one you want.
Flags -min and -max can be used to override the min and max values as
read from the FITS header or the image data if no DATAMIN and DATAMAX keywords
are found. Flag -scanmax can be used to force the program to scan the data
even when DATAMIN and DATAMAX are found in the header. If -printmax is
specified, the program will just print the min and max values and quit.
Flag -noraw can be used to force the program to produce an ASCII portable
anymap.
The program will tell what kind of anymap is writing. All flags can
be abbreviated to their shortest unique prefix.
FITS stands for
Flexible Image Transport System. A full description can be found in Astronomy
& Astrophysics Supplement Series 44 (1981), page 363.
pnmtofits(1)
,
pgm(5)
, pnmflip(1)
Copyright (C) 1989 by Jef Poskanzer, with modifications
by Daniel Briggs (dbriggs@nrao.edu) and Alberto Accomazzi (alberto@cfa.harvard.edu).
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